Phil Libin, founder of Evernote, speaking at the web summit being held at the RDS in Dublin. Photograph: Niall Carson/PA

On stage at Dublin's Web Summit, Evernote founder Phil Libin said that he thought the public and the tech industry needs to decide what action it wants from the government on the activity of its national security service.

"This can be solved in six months – we just have to figure out what we want the government to do. It's good to be having this discussion right at the beginning of these services."

Libin has described his vision for Evernote as a "100-year company", and says that 75% of users find the service on mobile first. An IPO is inevitable in 2-3 years time, but is "just paperwork", he told the Irish tech conference on Thursday.

• Evernote launched its business service for small to medium sized companies in December 2012